96502158a4
Changes in 4.9.294 nfc: fix segfault in nfc_genl_dump_devices_done net/mlx4_en: Update reported link modes for 1/10G parisc/agp: Annotate parisc agp init functions with __init i2c: rk3x: Handle a spurious start completion interrupt flag net: netlink: af_netlink: Prevent empty skb by adding a check on len. tracing: Fix a kmemleak false positive in tracing_map hwmon: (dell-smm) Fix warning on /proc/i8k creation error mac80211: send ADDBA requests using the tid/queue of the aggregation session recordmcount.pl: look for jgnop instruction as well as bcrl on s390 dm btree remove: fix use after free in rebalance_children() nfsd: fix use-after-free due to delegation race soc/tegra: fuse: Fix bitwise vs. logical OR warning igbvf: fix double free in `igbvf_probe` ixgbe: set X550 MDIO speed before talking to PHY USB: gadget: bRequestType is a bitfield, not a enum PCI/MSI: Clear PCI_MSIX_FLAGS_MASKALL on error USB: serial: option: add Telit FN990 compositions timekeeping: Really make sure wall_to_monotonic isn't positive net: systemport: Add global locking for descriptor lifecycle firmware: arm_scpi: Fix string overflow in SCPI genpd driver fuse: annotate lock in fuse_reverse_inval_entry() scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select() net: lan78xx: Avoid unnecessary self assignment ARM: 8805/2: remove unneeded naked function usage mwifiex: Remove unnecessary braces from HostCmd_SET_SEQ_NO_BSS_INFO Input: touchscreen - avoid bitwise vs logical OR warning xen/blkfront: harden blkfront against event channel storms xen/netfront: harden netfront against event channel storms xen/console: harden hvc_xen against event channel storms xen/netback: fix rx queue stall detection xen/netback: don't queue unlimited number of packages Linux 4.9.294 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I1f6f7cacef0a205b7bb06cce5c1ed1691879b2fa
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*
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* linux/arch/arm/mm/copypage-xsc3.S
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*
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* Copyright (C) 2004 Intel Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Adapted for 3rd gen XScale core, no more mini-dcache
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* Author: Matt Gilbert (matthew.m.gilbert@intel.com)
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*/
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#include <linux/init.h>
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#include <linux/highmem.h>
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/*
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* General note:
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* We don't really want write-allocate cache behaviour for these functions
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* since that will just eat through 8K of the cache.
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*/
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/*
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* XSC3 optimised copy_user_highpage
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*
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* The source page may have some clean entries in the cache already, but we
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* can safely ignore them - break_cow() will flush them out of the cache
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* if we eventually end up using our copied page.
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*
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*/
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static void xsc3_mc_copy_user_page(void *kto, const void *kfrom)
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{
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int tmp;
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asm volatile ("\
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pld [%1, #0] \n\
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pld [%1, #32] \n\
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1: pld [%1, #64] \n\
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pld [%1, #96] \n\
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\n\
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2: ldrd r2, [%1], #8 \n\
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ldrd r4, [%1], #8 \n\
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mcr p15, 0, %0, c7, c6, 1 @ invalidate\n\
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strd r2, [%0], #8 \n\
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ldrd r2, [%1], #8 \n\
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strd r4, [%0], #8 \n\
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ldrd r4, [%1], #8 \n\
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strd r2, [%0], #8 \n\
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strd r4, [%0], #8 \n\
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ldrd r2, [%1], #8 \n\
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ldrd r4, [%1], #8 \n\
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mcr p15, 0, %0, c7, c6, 1 @ invalidate\n\
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strd r2, [%0], #8 \n\
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ldrd r2, [%1], #8 \n\
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subs %2, %2, #1 \n\
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strd r4, [%0], #8 \n\
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ldrd r4, [%1], #8 \n\
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strd r2, [%0], #8 \n\
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strd r4, [%0], #8 \n\
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bgt 1b \n\
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beq 2b "
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: "+&r" (kto), "+&r" (kfrom), "=&r" (tmp)
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: "2" (PAGE_SIZE / 64 - 1)
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: "r2", "r3", "r4", "r5");
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}
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void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma)
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{
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void *kto, *kfrom;
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kto = kmap_atomic(to);
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kfrom = kmap_atomic(from);
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flush_cache_page(vma, vaddr, page_to_pfn(from));
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xsc3_mc_copy_user_page(kto, kfrom);
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kunmap_atomic(kfrom);
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kunmap_atomic(kto);
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}
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/*
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* XScale optimised clear_user_page
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*/
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void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
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{
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void *ptr, *kaddr = kmap_atomic(page);
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asm volatile ("\
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mov r1, %2 \n\
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mov r2, #0 \n\
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mov r3, #0 \n\
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1: mcr p15, 0, %0, c7, c6, 1 @ invalidate line\n\
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strd r2, [%0], #8 \n\
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strd r2, [%0], #8 \n\
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strd r2, [%0], #8 \n\
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strd r2, [%0], #8 \n\
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subs r1, r1, #1 \n\
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bne 1b"
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: "=r" (ptr)
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: "0" (kaddr), "I" (PAGE_SIZE / 32)
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: "r1", "r2", "r3");
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kunmap_atomic(kaddr);
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}
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struct cpu_user_fns xsc3_mc_user_fns __initdata = {
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.cpu_clear_user_highpage = xsc3_mc_clear_user_highpage,
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.cpu_copy_user_highpage = xsc3_mc_copy_user_highpage,
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};
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